Trevin Wax (PhD, Southeastern Baptist Theological Seminary) is vice president of research and resource development at the North American Mission Board and a visiting professor of theology at Cedarville University. A former missionary to Romania, Trevin is a regular columnist at The Gospel Coalition and has contributed to The Washington Post, Religion News Service, World, and Christianity Today. He has served as general editor for The Gospel Project and has taught courses on mission and ministry at Wheaton College. He is the author of several books, including The Multi-Directional Leader, Rethink Your Self, This Is Our Time, Eschatological Discipleship, and Gospel CenteredTeaching. He lives in middle Tennessee with his wife, Corina, and their three children.

Kevin J. Vanhoozer (PhD, Cambridge University) is Research Professor of Systematic Theology at Trinity Evangelical Divinity School in Deerfield, Illinois. He is the author of many works, including First Theology, The Drama of Doctrine and is coauthor with Daniel Treier of Theology and the Mirror of Scripture.